Michigan’s attorney general will announce criminal charges Wednesday against two state regulators and a Flint employee, alleging wrongdoing related to the city’s lead-tainted water crisis, according to government officials familiar with the investigation.

The charges are the first to be levied in a probe that is expected to broaden. They will be filed against a pair of state Department of Environmental Quality officials and a local water treatment plant supervisor.

The charges include violating Michigan’s drinking water law, official misconduct, destruction of utility property and evidence tampering.

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